Double-acting pump



(No Model.)

W. B. JACOBS.

.DOUBLE AGTINGPUMP.

No. 416,035. Patented Nov. Z6, 1889.

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UNITED STATESr PATENT OFFICE.

IVILBERT B. JACOBS, OF GROVE CITY, PENNSYLVANIA.

DOUBLE-ACTING PUMP.

SPECIFICATION forming part of Letters Patent No. 416,035, dated November 26, 1889.

Application led August ZZ. 1889. Serial No. 321,566. (No model.)

T0 all whom t may concern.-

Be it known that I, WILBERT B. JACOBS, a citizen'of the United States, residing at Grove City, in the county of Mercer and State of Pennsylvania, have invented certain new and useful Improvements in Double- Acting Pumps, of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure l represents a vertical sectional view of my improved pump; Fig. 2, a sectional view of the water-chamber and con- `nected pipes; Fig. 3, a sectional view ot the upper cylinder and its parts; Fig. 4, a horizontal sectional view on the line cc of Fig. l, and Fig. 5 a sectional view ot' a modication.

The object of t-he invention is essentially to improve the general construction of the pump and provide means for insuring a steady and continuous supply of water, as will be more fully hereinafter specified.

Another essential object is to provide means for adjusting the plungers in their respective cylinders without removing or disturbing any of the parts of the pump.

Other minor objects will appear in the course of this specification.

Referring to the drawings, a designates the pump stand or casing, which is cast in two parts and bolted togetherl and rests upon the well-platform. Between the parts of this casing is clamped the water-chamber b, which is constructed, preferably, of cast metal, and is of any suitable size and shape. Screwed into the top of this water-chamber is the dischargepipe c, which passes up between the parts of the casing a, and is provided with a suitable spout at its upper end. The air chamber or pipe d is also screwed into the upper side of the water-chamber and extended up between the parts of the casing, this air-pipe having its upper end closed and provided with a relief-cock d.

The plunger-rod e is operated by means of a suitable handle fulcrumed upon an arni on the casing and connectedto the rod by means of a pair of pivotal links; or it may be connected to the pitman of a windmill, the said arm serving as a guide to the-plunger-rod.

Screwed into the bottom of the water-chamber is a depending pipe f, which is connected by means of a cap f to a cylinder g, the parts being screwed together. Clamped between the cap f and the upper end of the cylinder g is a removable disk 7L, provided with perforations h for the passage of the water. vConnected to and communicating with the lower end of cylinder g by means of a suitable length of pipe is the lower main cylinder c', 6o which is preferably constructed of or lined with glass or porcelain, and is double the ordinary length. IVorking in this cylinder is an ordinary valved plunger m, connected to the lower end of the plunger-rod. In the bottom of the cylinder, over the opening therein, is a check-'valve t. If desired, a supplemental valve and valve-chamber j may be connected to the lower end of this cylinder to relieve the main valve of part of its strain, 7o and also for security against leakage in case the main Valve becomes worn. The plungerrod being made in sections screwed together,

it sometimes happens that the parts become detached and the plunger settles or falls to 75 the bottom 'of the cylinder. To hold the plunger :t against turning while the parts are being screwed together,I provide the plunger with suitable lugs 7.2, which are adapted to engage lugs or notches 7d in the bottom of the 8o cylinder. Depending from the center of the removable disk 7L is a suitable open-ended cylinder Z, which is smaller in diameter than the lower main cylinder t, preferably onehalf its capacity. Torking in this cylinder isa solid plunger m, through which the plunger-rod passes, this plunger being attached adj ustably to the plunger-rod by means of a 'tubular rod n, which surrounds the plungerrod and extends up a sufficient distance to be 9o accessible from thewell-platform. This tubular rod n is adj ustably but rigidly attached to the plunger-rod by means of a set-screw n or other device, and atits lower end it is connected to the plunger or piston fm. By thus making the plunger m adjustable from the surface of the ground the removal of the parts from the well for the purpose of adjustment is avoided-a great desideratum in this class of pumps. It will also be observed that loo the two pump-cylinders may be made double or triple the ordinary length, so that when one portion of the cylinders becomes worn from usage the plungers may b readily adj usted up or down, so as to Work upon other portions of the cylinders without disturbing any ofthe parts of the pump. Connect-ing the top of the water-chamber to the ring or disk h, and surrounding the tubular rod n, is a tube p, which communicates with the cylinder Z above its piston and supplies air thereto.

The letter q designates a cock to draw off water in stand-pipe to prevent freezing in cold weather.

In operation, the water will be forced out at the discharge-spout in a steady forcible stream, the lower valved plunger and its cylinder being of sufficient capacity to fill the upper cylinder Z, and also force the water out at the spout during the upstroke, while the solid plunger m will continue forcing the water up during the downstroke of plungerrod.

In Fig. 5 I show that some of my improvements may be used in connection with an ordinary lift-pump provided with a single valved plunger.

Having thus fully described Iny invention, what I claim isl l. The combination of the two cylinderst' and g, stand-pipe connecting these cylinders to a discharge-pipe c, a cylinder Z, smaller in diameter than the cylinders c' g, a plungerrod c, passing down through these cylinders and provided with a valved plunger at its lower end, this plunger workingin the lower cylinder 1j, a plunger m, provided with a central aperture for the passage of the plungerrod and working in the said cylinder Z, and a tube n, connected to this plunger m and extending up outside of the well, where it is adjustably secured to the plunger-rod, substantially as and for the purpose set forth.

2. The combination of Water-chamber and discharge-pipe f, the cylinders g and t', communicating with said discharge-pipe, plungerrod and valved plunger therefor, the cylinder Z, suspended in cylinder g and open at both ends, a tubep, connectingthe upper open end of the cylinder Z with the top of water-charnber, a solid plunger working in said cylinder Z and provided with a central passage for plunger-rod, and a tube n, connected to said solid plunger and adj ustably attached to the plunger-rod, substantially as described.

In testimony whereof I afx mysign ature in presence of two witnesses.

IVILBERT B. JACOBS.

Witnesses:

B. P. JACOBS, GEO. O. JONES. 

